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効能
神経筋遮断薬
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化学的特性
White to yellowish-white powder, slightly hygroscopic
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使用
A neuromuscular blocking agent
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定義
ChEBI: The bisbenzenesulfonate salt of atracurium.
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生物学の機能
Atracurium besylate (Tracrium) is a benzylisoquinolinium
compound like d-tubocurarine. Its actions are similar
to those of d-tubocurarine, but its duration of action
is shorter (45 minutes) because of spontaneous degradation
of the molecule (Hofmann elimination). Because
of this, atracurium is useful in patients with low or atypical
plasma cholinesterase and in patients with renal or
hepatic impairment.
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一般的な説明
Atracurium besylate, 2-(2-carboxyethyl)-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methyl-1-veratrylisoquinolinium benzenesulfonate pentamethyleneester (Tracrium), is a nondepolarizing neuromuscular blockingagent that is approximately 2.5 times more potent thand-tubocurarine. Its duration of action (half-life, 0.33 hours)is much shorter than that of d-tubocurarine.
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臨床応用
Atracurium Besylate is metabolized rapidly and nonenzymatically to yield laudanosineand a smaller quaternary compound ,which do not have neuromuscular blocking activity. In vitroexperiments show that atracurium besylate breaks down atpH 7.4 and 37°C by a Hoffman elimination reaction.Atracurium besylate undergoes enzymatic decompositionof its ester function to yield an inactive quaternary alcoholand quaternary acid. AChE inhibitors such as neostigmine,edrophonium, and pyridostigmine antagonize paralysis byatracurium besylate.
